JPH03251B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention stores seat positions suitable for multiple drivers and automatically sets the seats to positions suitable for each driver based on the stored seat positions. This invention relates to a seat device.

In recent years, in vehicles, seats that can be electrically operated by operating a predetermined switch and that are suitable for the driver have been used as devices to automatically adjust the seat position according to the driver's sitting posture. The positions of several people can be memorized in advance, and when a driver changes, etc., if the seat position suitable for the driver is selected from among the memorized seat positions, the seat will be changed to the selected seat. Electric seat devices have been proposed that are automatically positioned.

In order to automatically position the seat, this type of electric seat device needs to move the seat while constantly detecting the current position of the seat. There is a configuration in which the current position of the sheet is determined from the amount of movement relative to the origin, such as by setting the origin as the origin and detecting how many times the sheet moving motor rotates while the sheet moves from the origin to the current position. .

A volatile memory (RAM) is usually used to constantly update and store the detection data of the relative movement amount as current position data of the sheet.

This RAM is constantly backed up by the battery in the vehicle, and even if the power switch for driving each electrical load is turned off, the current position data of the seat remains unchanged so that it can be restored again. Care has been taken to ensure that the current position data does not change when the drive power switch is turned on.

By the way, when it comes to vehicles, the battery is often removed due to the necessity of replacing the battery.
RAM backup is interrupted and the memory contents in RAM are erased.

Therefore, when the battery is connected next time, the current position data of the seat will be completely different from what it was before the battery was removed, and even if the seat is automatically positioned, it will not be set to the preset position.

As a countermeasure, for example, if a limit switch or the like is installed at the origin position and a battery is connected, the sheet is returned to the origin position, and when the sheet moves to the origin position, the current position is stored in the RAM.
A method has been considered in which the memory contents of the electric seat device are cleared, but in this type of electric seat device, the return-to-origin operation after connecting the battery is time-consuming, and if the return-to-origin operation is forgotten, the Correct seat positioning operation becomes impossible. Similarly, if the seat detector at the origin position breaks down, if the battery is removed, accurate positioning of the seat will no longer be possible, resulting in inconveniences in terms of operability and safety. Ta.

This invention was made in view of the above circumstances, and its purpose is to set the seat position at the time of turning on the ignition switch for the first time after connecting the battery as the original position, so that the battery can be removed. An electric seat device that improves operability and automation by eliminating the hassle of returning the seat to its home position each time it is connected, and by eliminating the inconvenience of forgetting to return to the home position and not being able to move accurately from now on. It is about providing.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an electrical circuit diagram showing the hardware configuration of an embodiment of the electric seat device according to the present invention.

In the figure, after the output power line of a battery 1 mounted on a vehicle is branched into two systems, the first line _l1 is connected to a power supply terminal Vcc of a microcomputer C via a fuse 3 and a first power supply circuit 5. is being supplied to.

Further, the second power line _l2 is supplied to the HLT terminal of the microcomputer C after passing through the ignition switch 2, the fuse 4, and the second power supply circuit 6, and at the same time, the second power line _l2 is supplied to the HLT terminal of the microcomputer C. are seat moving motors 30 and 34, respectively.
In addition to being supplied to switching relays 17, 20, 23, and 26 that switch the rotational directions of these motors 30 and 34, it is also supplied as a power source for a relay 8 for preventing erroneous output and channel display LEDs 37 to 40, which will be described later. ing.

The seat moving motors 30 and 34 are installed on the lower surface of the driver's seat S as shown in FIG. 2, and although not shown, the rotation of each motor is controlled by a planetary gear reducer. The power is transmitted to a rack attached to the lower surface of the seat S to move the seat S up and down and back and forth.

The motor 30 is for moving the seat S up and down in the vertical direction to position the seat at a height that suits the height of the driver.
The seat S is moved in the longitudinal direction of the vehicle body to position the seat to a position that suits the length of the driver's legs.

In addition, in order to detect the moving position of the sheet S, a magnetic body is attached to the rotating shaft of each motor 30, 34, and a pulse signal is inputted to the microcomputer C by being turned on and off by the magnetic force of this magnetic body. Reed switches 29 and 33 are provided.

Furthermore, limit switches 31, 32, 35, and 36 provided in the respective movement directions are configured to be turned off at the end of the movement of the seat S in the forward and backward movement and in the vertical movement. , 36 are turned off, the power supply to the motor is stopped, thereby preventing burnout of the motor and failure of the drive system.

The microcomputer C performs predetermined memory backup and the like by the power constantly supplied via the first power supply circuit 5, and the output of the second power supply circuit 6 causes the HLT terminal to receive "". When "H" is being supplied, a predetermined system program, which will be described later, is executed.

When the stop switch 11 is operated, each output transistor 13, 14, 15, 16
The conduction between the emitter and GND of
The operation is detected by _P1 , and a stop signal is also sent to the program in microcomputer C.

Next, each port P ₀ of microcomputer C
~P. ₂₂ 's functions are briefly explained.

Port P ₀ ; As mentioned above, port P ₀ is connected to the second power line _l2 , so if the ignition switch 2 is turned off or the fuse 4 is disconnected, it is connected to the second power line l2. It can be detected quickly before the output of the power supply circuit 6 decreases.

Port _P1 : As mentioned above, it is connected to the connection point between the pull-up resistor 7 and the stop switch 11, and therefore, based on the state of this port _P1 rising from "L" to "H" , it is possible to detect that the stop switch 11 has been operated.

Port P ₂ ; Connected to the base of the transistor 12. Therefore, by outputting "H" to this port P ₁₂ , the transistor 12 is turned on and the coil 9 of the relay 8 is energized, and its contact point is turned on. 10 is turned on, and each output transistor 13, 14, 1
The ground lines 5 and 16 can be made conductive and each output transistor can be set to an active state.

Port _P3 : Connected to the reed switch 29 for detecting the rotation speed of the seat lifting motor 30, and by counting the pulse train supplied to this port _P3 , it is possible to determine how far the seat S is raised or lowered in the vertical direction. Have you moved?
In other words, the amount of relative movement can be detected.

Ports P ₄ and P ₅ ; connected to the bases of output transistors 13 and 14, respectively;
In the state of P ₄ = “H” and P ₅ = “L”, the coil 18 of the switching relay 17 is energized, and its contact 19 is switched to the second power supply line _l2 side, thereby switching the second power supply line l2 side. Current flows in the order of line l ₂ -> contact 19 -> motor 30 -> contact 22 -> ground, and the motor 30 rotates in the normal direction, causing the sheet S to move upward.

On the other hand, port P ⁴ = “L”, port
In the state of P ₅ = “H”, the coil 21 of the switching relay 20 is energized, its contact 22 is switched to the second power line l ₂ side, and the current is transferred to the second power line l ₂ → Contact 2
2→motor 30→contact 19→ground, the motor 30 reverses, and the seat S is moved downward.

Port P ₆ ; Connected to the reed switch 33 for detecting the rotational speed of the motor 34 for moving the seat back and forth, and can detect the amount of seat back and forth movement similarly to the port P ₃ .

Ports P ₇ and P ₈ ; connected to the bases of output transistors 15 and 16, respectively;
The output operation similar to that of the ports P ₄ and P ₅ is performed to switch the switching relays 23 and 26, and to control the forward and reverse rotation of the motor 34 for moving the seat back and forth.

Port P ₉ ; Connected to the coil 18 and seat manual switch 47, this port P ₉
is “L”, motor 3
It is possible to detect that 0 is rotating in the normal direction.

Port P ₁₀ ; Connected to the coil 21 and seat manual switch 48, this port P ₁₀
is “L”, motor 3
It is possible to detect that 0 is being reversed.

Port P ₁₁ ; Connected to the coil 24 and seat manual switch 49, this port P ₁₁
is “L”, the motor 34
It can be detected that the motor is rotating in the normal direction.

Port P ₁₂ ; Connected to the coil 27 and seat manual switch 50, this port P ₁₂
is “L”, the motor 34
It can be detected that the current is being reversed.

Port P ₁₃ ~ P ₁₆ ; LLED3 for channel display
Therefore, by outputting "L" to these ports, the LEDs 37 to 40 can be driven to light up as appropriate.

Ports P ₁₇ to _{P 20} are connected to channel switches 41 to 44, respectively, and therefore it is possible to determine which memory channel is specified depending on which of these ports is supplied with “L”. can be detected.

Port _P21 : Connected to the preset switch 45. Therefore, by supplying "L" to this port _P21 , it is possible to detect that the memory mode has been set.

Port P ₂₂ ; connected to buzzer 46;
Therefore, the buzzer 46 can be driven by outputting "H" to this port _P22 .

As explained above, microcomputer C
A state signal indicating each state of the external circuit or a control output signal for the external circuit appears at each port P ₀ to P ₂₂ as appropriate.

The seat moving motors 30 and 34 are controlled by the output from the microcomputer C, and can also be controlled in parallel by the operation of the seat manual switches 47 to 50.

That is, the seat manual switch 47
50, as shown in FIG. 3, is comprised of a two-way toggle switch 52 with a neutral position for instructing the forward and backward movement of the seat, and a two-way toggle switch 53 also with a neutral position for instructing the up-and-down movement of the seat. ing.

When the toggle switch 53 is set to the upper side, the seat manual switch 47
is turned on, the coil 18 is energized, the motor 30 rotates forward, and the seat S is moved up and down. On the other hand, when the toggle switch 53 is set to the lower side, the seat manual switch 48 is turned on. Then, the coil 21 is energized and the motor 3
0 is reversed and the sheet S is moved downward.

Similarly, if the toggle switch 52 is set to the front side, the seat manual switch 49 is turned on, and if it is set to the rear side, the seat manual switch 50 is turned on, causing the motor 34 to rotate forward.
Reverse rotation is performed, and the seat S is moved back and forth.

Next, FIGS. 4 to 6 are flowcharts schematically showing the structure of the system program executed in the microcomputer C, and hereinafter, the operation of this embodiment device will be systematically explained according to this flowchart. explain.

This electric seat device has manual switch 5.
2 and 53 to position the seat S at a desired position, and a memory switch 45 and a channel switch 41 to control the individual seat position determined by this manual mode.
44, the preset operation mode to be preset and channel switches 41 to 4 are set.
By the operation 4, it is possible to select and use the preset return operation mode in which the seat is automatically set to the preset seat position.

By executing the origin setting process shown in the flowchart of FIG. 4, this electric seat device accurately determines the current position of the seat from the rotational speed of the motor when each of the above operation modes is executed. A reference position for this purpose is set.

This origin setting process is executed every time the ignition switch 2 is turned on.

First, in step (1), the outputs of each port _P0 to _P22 are reset to bring the operation of each part to its initial state.

Next, in step (2), it is determined whether or not the ignition switch 2 is turned on for the first time after the battery is connected.

Specifically, when the ignition switch 2 is turned on, a process is performed to determine whether the RAM that stores preset data has been backed up, and a predetermined backup register BR in the RAM is
It is determined whether specific flag data BF indicating backup is stored in the file.

If the flag data BF in the RAM is erased and becomes a random value, the judgment result in step (2) above becomes YES, and the battery is removed before the ignition switch is turned on. This means that the backup has stopped and various data stored in the RAM have been erased, and the following steps (3) to (6) are executed to set a new origin.

In step (3), the contents of the counter M that stores the current position of the seat in the longitudinal direction and the counter N that stores the current position of the seat in the vertical direction are cleared, and the ignition switch is turned on. The current position of the sheet S is set as the new origin.

Next, in step (4), each sheet setting value data (which has not actually been backed up) that was preset in the front/back direction and up/down direction preset registers Am, An to Dm, and Dn of each channel A to D is retrieved. The preset data is erased by storing a zero code (one of the count values of counters M and N, which cannot be taken within the movement range of the sheet, is used as the zero code) instead of the preset data (which is random data because there is no data). Ru.

Next, in step (5), a moving direction flag PF for determining the moving direction of the sheet, a preset return operation flag MF that is set when the preset return operation is being performed, and the upper and lower positions during the sheet preset return operation are set. Various processing flags such as the vertical movement flag LF that are set when the movement is completed are cleared, and the backup flag data BF is stored in the backup register BM of the RAM.

Then, in step (6), all LEDs 37 to 40 are turned off to indicate that all preset data of all channels have been erased.

The LEDs 37 to 40 are provided for each channel as shown in Fig. 3, and correspond to the channel in which the sheet setting position data is preset.
By lighting up the LED, you can visually check which channels are preset or not.

In this way, if the ignition switch is turned on for the first time after the battery is connected, the seat position at that time will be set as the new origin position, and processing such as erasing each preset data will be performed. The current position data associated with subsequent seat movement will be calculated based on this new origin position.

On the other hand, if the ignition key switch is not turned on for the first time after the battery is connected, the RAM backup has already been performed and the above backup flag data BF remains, so the steps above cannot be performed. The judgment result of (2) is
If the answer is NO, the following steps (3) to (6) will be jumped and the process will proceed to the next step.

In manual mode operation, although not particularly shown in the flowchart, the microcomputer C is always connected to the reed switch 2 via port _P3 .
9 and the pulse train output from reed switch 33 via port _P6 are counted.

Furthermore, the forward and reverse rotation states of the motors 30 and 34 are detected depending on the logic states of ports _P9 to _P12 .

Then, based on the logical states of ports P ₉ and P ₁₀ ,
When it is determined that the seat is raised or lowered, the contents of the counter N indicating the current vertical position of the seat are increased by +1.
Or -1, so that the contents of the counter N always correspond to the current position of the sheet in the vertical direction.

Similarly, based on the logic states of ports P ₁₁ and P ₁₂ , the contents of counter M, which indicates the current position of the seat in the longitudinal direction, are incremented by +1 or -1. The direction corresponds to the current position.

Microcomputer C operates as described above, so in this state, operate the manual switch as appropriate to move the sheet to the desired position.
If set to height, counter M and counter N
The contents correspond to the current position of the sheet at that time.

Next, through the above operations, a preset operation is performed in which the sheet coordinate data formed on the M and N counters is stored in the memory of the specified channel in the microcomputer C.

This preset operation is executed in steps (7) and (8) in the flowchart shown in FIG.
When it is determined that the memory switch 45 has been turned on, the process advances to step (8) and preset processing is performed.

The preset process executed in step (8) is performed after the memory switch 45 is turned on.
By turning on a desired one of the channel switches 41 to 44, a process is performed in which the seat position set by the manual operation is stored as personal data in the turned-on channel.

That is, preset registers Am, An to Dm, and Dn are provided for each channel to store preset data in the front-rear direction and up-down direction, and it is difficult to determine which of channels A to D the switch is turned on. The current sheet position data in the current position counters M and N formed by the manual operation is transferred and stored in the preset register of that channel in accordance with the result of this judgment.

Next, the operation in the preset return mode will be explained.

Assume now that the channels A, B, C, and D have already stored seat position data unique to each driver.

This preset return mode is performed by executing the processes from step (9) in FIG. 5 to step (52) in FIG. 6. The preset return process will be explained below according to the flowchart. do.

When the desired channel switch is turned on, the execution content of step (9) in Fig. 5 becomes YES.
Then, depending on whether the operated channel switch is A, B, C, or D, the steps are (10) → (13) → (14) → (15) → (16).
Or step (10) → (11) → (17) →
(18) → (19) → (20) or step (10)
→(11)→(12)→(21)→(22)→(23)→
(24) → or step (10) → → (11) →
One of (12)→(25)→(26)→(27)→(28) is alternatively executed.

As a result, the set position register Wm in the front and rear direction of the seat and the set position register in the vertical direction
The preset data stored in the preset registers of the channel turned on (for example, preset registers Am and An for the A channel) is transferred to Wn.

In this way, when the preset data is transferred and stored in each set position register Wm, Wn in the front/back and up/down directions, step (29) is executed next, and the set position register Wm in the front/back direction of the sheet and the set position register Wm in the front/back direction of the sheet are transferred. Wm between the forward and backward current position register M
The calculation -M is performed, and the calculation result is stored in the sheet longitudinal direction deviation register εm.

Next, when step (30) is executed, it is determined whether the contents of the longitudinal deviation register εm are positive or not.

Here, the fact that the content of the longitudinal direction deviation register εm is positive means that the position of the seat in the longitudinal direction indicated by the preset data in the longitudinal direction of the seat is located in front of the current position.

Therefore, if the content of the deviation register εm is positive, step (32) is executed and the sheet starts moving forward.

Next, the counter increment process consisting of steps (32) to (35) is executed, and the value of the forward/backward current position register M is counted up in response to the pulse train output from the reed switch 33, and from then on the sheet moves forward. Move and step (29) → (30) → (32) until you reach the preset position.
→ (33) → (34) → (35) → (29) are repeated.

Furthermore, if the content of the longitudinal direction deviation register εm is negative, the seat position indicated by the longitudinal direction preset data is behind the current position, and steps (29)→(30) →
Steps (31) → (36) are executed to start the backward movement of the seat, and the following steps (37) → (38) →
(39) is executed to count down the current position register M in the longitudinal direction, and the seat moves backward, and this process is repeated until it reaches the preset position.

If the content of the longitudinal deviation register εm becomes 0, it is determined that the sheet matches the preset position in the longitudinal direction, and the process of step (40) is executed to start the motor for longitudinal movement. 34 is stopped, and the preset return process in the front and back direction of the seat is completed.

Thereafter, similar processing is performed to position the sheet in the preset vertical position.

That is, in step (40), the calculation Wn-N is performed between the sheet vertical preset register Wn and the sheet vertical current position register N, and the calculation result is sent to the sheet vertical deviation register εn. Stored.

Then, in the following steps (42) or (43), depending on whether the vertical deviation register εn is positive, negative, or 0, steps (42) → (44) are performed.
→ (45) → (46) → (47) or step (42) → (43) → (48) → (49) → (50) → (51)
is executed, and the sheet is moved upward and the current position register N in the vertical direction is counted up, or the seat is moved downward and the current position register N is counted down in the vertical direction.

Then, the value of the vertical deviation register εn is 0.
If it is determined that the next sheet matches the preset position in the vertical direction, step (50) is executed.
After the process is executed, the motor 30 for vertical movement is activated.
energization is stopped, and the preset return process in the vertical direction of the sheet is completed.

In the above embodiment, a reed switch was used as a small rotation detector to detect the rotation of the motor, but in addition to this, for example, a Hall element that detects the magnetic flux of a magnetic material may be used. Of course, the present invention is not limited to the above-mentioned reed switch.

As explained in detail above, in the electric seat device of the present invention, the seat position at the time of the first ignition switch ON operation after battery connection is set as the original position, so that the seat position can be specified as in the conventional method. This saves you the trouble of moving the sheet to this home position every time you connect the battery, and it also prevents you from forgetting to return the sheet to this home position, or if the sheet detector at the home position malfunctions. It is possible to prevent the current position data from becoming incorrect data, thereby improving operability and automation.

Further, it is not necessary to provide a sheet detector such as a limit switch at the origin position, which has the advantage of reducing manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing the hardware configuration of an embodiment of an electric seat device according to the present invention, FIG. 2 is a perspective view showing the moving direction of the seat of the same device, and FIG.
This figure is a plan view of the operation panel, FIG. 4 is a flowchart showing the origin setting process in the same apparatus, and FIGS. 5 and 6 are flowcharts showing the preset process and preset return process. 1...Battery, 2...Ignition switch, C...Microcomputer, S...Seat, 30...Seat elevating motor, 34...Seat back and forth movement motor, 29, 33...Reed switch, 41 ~44...Channel switch, 45
...Memory switch, 47-50...Manual switch.

Claims (1)

[Scope of Claims] 1. A seat body supported movably in a predetermined direction; A drive motor for moving the seat body; Rotating the drive motor in a desired direction in response to a predetermined switch operation; a manual control circuit for controlling; a rotation detector for outputting a signal corresponding to the amount of rotational displacement of the drive motor; a first controller for storing the amount of relative movement of the seat body obtained by accumulating the outputs of the rotation detector; a volatile memory; a second volatile memory that transfers and stores the storage contents of the first volatile memory in response to a predetermined switch operation; a preset return in which the drive motor is controlled to move the seat body to a position corresponding to the stored content of the second volatile memory so that the stored content of the volatile memory matches the stored content of the second volatile memory; a control means; when the on operation of the ignition switch is the first on operation after the battery is connected, the first control means;
1. An electric seat device comprising: an origin setting control means for resetting the contents of a volatile memory to an initial value.